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Low-noise real-time global illumination drawing method for three-dimensional geometric scene

A technology of 3D geometry and global illumination, applied in 3D image processing, image data processing, instruments, etc., to improve rendering quality, reduce modeling costs, and reduce noise

Active Publication Date: 2013-12-04
INST OF AUTOMATION CHINESE ACAD OF SCI
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to perform real-time low-noise global illumination rendering of three-dimensional geometric scenes in a distributed manner

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  • Low-noise real-time global illumination drawing method for three-dimensional geometric scene

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Embodiment Construction

[0024] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0025] figure 1 A low-noise real-time global illumination rendering method for a three-dimensional geometric scene proposed by the present invention is shown, and the method includes the following steps:

[0026] Step 1: Start the main node to initialize the drawing of each frame image, including drawing viewport segmentation, model differential transmission and drawing background stickers Figure three modules. If it is the first frame, the viewport is divided according to the preset ratio, the model is differentially encoded and the background texture is drawn. Distribute the divided viewport parameters (including the position coordinates of the upper left corner of the sub-viewport, the length and width dimensions, ...

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Abstract

The invention discloses a low-noise real-time global illumination drawing method for a three-dimensional geometric scene. The low-noise real-time global illumination drawing method comprises the steps of: initializing drawing of a current frame image by a main node, including, drawing view-port segmentation, model differential transmission and drawing background chartlet, and distributing segmented view-port parameters, a three-dimensional model and a background chartlet to each sub-node; carrying out multi-scale view-port layered drawing for the received three-dimensional model and video-port parameters, and transmitting each layer of drawn images to the main node by the sub-node; synchronizing the image of the current frame drawn by each sub-node and displaying the images in the same layer in a splicing manner by the main node; counting the number of frames drawn by each sub-node every second and drawing the image of the next frame by the main node. As the global illumination way is adopted to draw a complex three-dimensional geometric scene, the low-noise real-time global illumination drawing method for the three-dimensional geometric scene can provide roaming and rapid browsing of fixed scenes and dynamic movable scenes for a user, and can reduce noise points in the drawing process, improve drawing quality and lower modeling cost of the three-dimensional scene.

Description

technical field [0001] The invention belongs to the field of computer graphics and virtual reality technology in computer application technology, and in particular relates to a low-noise real-time global illumination rendering method of a three-dimensional geometric scene. Background technique [0002] Photo-realistic rendering of 3D scenes is a challenging problem in the fields of computer graphics and virtual reality. However, all graphics processing unit (GPU) fixed pipelines currently use a rasterization rendering method based on local illumination calculations. Ray tracing is an effective global illumination rendering method, but its main difficulty is the huge intersection calculation overhead caused by the large number of geometric polygons in the scene when calculating the ray path for each sampled ray , which also includes noise from computing pixel color values ​​at sampling time. [0003] In 2002, the Computer Graphics Laboratory of Saarland University developed...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T15/50
Inventor 鲍冠伯车武军王政徐波
Owner INST OF AUTOMATION CHINESE ACAD OF SCI
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